<p>The dual-constituent anti-tetra-chiral lattice metamaterial (DATLM) structure exhibits a negative Poisson’s ratio (NPR) effect while achieving tailorable coefficients of thermal expansion (CTE), which is beneficial for the structure to adapt to complex environments with drastic temperature changes and susceptibility to impacts. This study investigates the deformation modes and impact resistance performance of DATLM structures at different impact velocities, and discusses the nominal stress-strain curves and energy absorption characteristics of DATLM structures with different size parameters. The results indicate that the bent ribs of the bi-material part with ligaments have an impact on the energy absorption of the DATLM structures. The work conducted can provide guidance for seeking size parameters of multifunctional DATLM structures that include excellent energy absorption performance.</p>